Tweco 250i Transmig Inverter - Manual (Page 48)

TRANSMIG 250i INSTALLATION/SETUP
INSTALLATION/SETUP 3-30 Manual 0-5187
NOTE
The regulator/flow meters used with argon based and carbon dioxide shielding gases are different. The
regulator/flow meter supplied is for argon based shielding gases. If carbon dioxide is to be used a suitable
carbon dioxide regulator/flow meter will need to be fitted.
NOTE
All valves downstream of the regulator must be opened to obtain a true flow rate reading on the outlet
gauge. (Welding power source must be triggered) Close the valves after the pressure has been set.
Installation
1. Remove cylinder valve plastic dust seal. Clean the cylinder valve outlet of impurities that may clog orifices and
damage seats before connecting the regulator.
Crack the valve (open then close) momentarily, pointing the outlet away from people and sources of ignition.
Wipe with a clean lint free cloth.
2. Match regulator to cylinder. Before connecting, check that the regulator label and cylinder marking agree and
that the regulator inlet and cylinder outlet match. NEVER CONNECT a regulator designed for a particular gas
or gases to a cylinder containing any other gas.
3. Connect the regulator inlet connection to cylinder or pipeline and tighten it firmly but not excessively, with a
suitable spanner.
4. Attach supplied gas line between the regulator output and the desired input at the rear of the power source.
MIG Spool Torch and TIG in the bottom fitting and regular MIG Torch in the top fitting.
Art # A-10239
Ensure that the gas
cylinder is secured to
a building pillar, wall
bracket or otherwise
securely fixed in an
upright position.
Figure 3-27: Attach gas line to proper inlet
5. To protect sensitive down-stream equipment a separate safety device may be necessary if the regulator is not
fitted with a pressure relief device.
Operation
With the regulator connected to cylinder or pipeline, and the adjustment screw/knob fully disengaged, pressurize as
follows:
1. Stand to one side of regulator and slowly open the cylinder valve. If opened quickly, a sudden pressure surge
may damage internal regulator parts.
2. With valves on downstream equipment closed, adjust regulator to approximate working pressure. It is recom-
mended that testing for leaks at the regulator connection points be carried out using a suitable leak detection
solution or soapy water.